Commit 811f0bd9 authored by libin's avatar libin Committed by Luis Henriques

recordmcount: Fix endianness handling bug for nop_mcount

commit c84da8b9 upstream.

In nop_mcount, shdr->sh_offset and welp->r_offset should handle
endianness properly, otherwise it will trigger Segmentation fault
if the recordmcount main and file.o have different endianness.

Link: http://lkml.kernel.org/r/563806C7.7070606@huawei.comSigned-off-by: default avatarLi Bin <huawei.libin@huawei.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarLuis Henriques <luis.henriques@canonical.com>
parent fd5507ba
...@@ -377,7 +377,7 @@ static void nop_mcount(Elf_Shdr const *const relhdr, ...@@ -377,7 +377,7 @@ static void nop_mcount(Elf_Shdr const *const relhdr,
if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) { if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
if (make_nop) if (make_nop)
ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset); ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
if (warn_on_notrace_sect && !once) { if (warn_on_notrace_sect && !once) {
printf("Section %s has mcount callers being ignored\n", printf("Section %s has mcount callers being ignored\n",
txtname); txtname);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment